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egroupware/phpgwapi/inc/class.egw_session.inc.php
Ralf Becker aca05a32e3 using new check_load_extension function
2009-04-20 12:43:44 +00:00

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<?php
/**
* eGroupWare API: eGW session handling
*
* This class is based on the old phpgwapi/inc/class.sessions(_php4).inc.php:
* (c) 1998-2000 NetUSE AG Boris Erdmann, Kristian Koehntopp
* (c) 2003 FreeSoftware Foundation
* Not sure how much the current code still has to do with it.
*
* Former authers were:
* - NetUSE AG Boris Erdmann, Kristian Koehntopp
* - Dan Kuykendall <seek3r@phpgroupware.org>
* - Joseph Engo <jengo@phpgroupware.org>
*
* @link http://www.egroupware.org
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @subpackage session
* @author Ralf Becker <ralfbecker@outdoor-training.de> since 2003 on
* @version $Id$
*/
/**
* eGW session handling
*
* Create, verifies or destroys an eGroupWare session
*
* There are separate session-handler classes: egw_session_(files|memcache),
* which implement custom session handler or certain extra functionality, like eg. listing sessions,
* not available in php's session extension.
*
* If you want to analyse the memory usage in the session, you can uncomment the following call:
*
* static function encrypt($kp3)
* {
* // switch that on to analyse memory usage in the session
* //self::log_session_usage($_SESSION[self::EGW_APPSESSION_VAR],'_SESSION['.self::EGW_APPSESSION_VAR.']',true,5000);
*/
class egw_session
{
/**
* Write debug messages about session verification and creation to the error_log
*/
const ERROR_LOG_DEBUG = false;
/**
* key of eGW's session-data in $_SESSION
*/
const EGW_SESSION_VAR = 'egw_session';
/**
* key of eGW's application session-data in $_SESSION
*/
const EGW_APPSESSION_VAR = 'egw_app_session';
/**
* key of eGW's required files in $_SESSION
*
* These files get set by egw_db and egw class, for classes which get not autoloaded (eg. ADOdb, idots_framework)
*/
const EGW_REQUIRED_FILES = 'egw_required_files';
/**
* key of eGW's egw_info cached in $_SESSION
*/
const EGW_INFO_CACHE = 'egw_info_cache';
/**
* key of eGW's egw object cached in $_SESSION
*/
const EGW_OBJECT_CACHE = 'egw_object_cache';
/**
* Name of cookie or get-parameter with session-id
*/
const EGW_SESSION_NAME = 'sessionid';
/**
* current user login (account_lid@domain)
*
* @var string
*/
var $login;
/**
* current user password
*
* @var string
*/
var $passwd;
/**
* current user db/ldap account id
*
* @var int
*/
var $account_id;
/**
* current user account login id (without the eGW-domain/-instance part
*
* @var string
*/
var $account_lid;
/**
* domain for current user
*
* @var string
*/
var $account_domain;
/**
* type flag, A - anonymous session, N - None, normal session
*
* @var string
*/
var $session_flags;
/**
* current user session id
*
* @var string
*/
var $sessionid;
/**
* an other session specific id (md5 from a random string),
* used together with the sessionid for xmlrpc basic auth and the encryption of session-data (if that's enabled)
*
* @var string
*/
var $kp3;
/**
* name of XML-RPC/SOAP method called
*
* @var string
*/
var $xmlrpc_method_called;
/**
* Array with the name of the system domains
*
* @var array
*/
private $egw_domains;
/**
* $_SESSION at the time the constructor was called
*
* @var array
*/
var $required_files;
/**
* Constructor just loads up some defaults from cookies
*
* @param array $domain_names=null domain-names used in this install
*/
function __construct(array $domain_names=null)
{
$this->required_files = $_SESSION[self::EGW_REQUIRED_FILES];
$this->sessionid = self::get_sessionid();
$this->kp3 = $_REQUEST['kp3'];
$this->egw_domains = $domain_names;
// verfiy and if necessary create and save our config settings
//
$save_rep = false;
if (!isset($GLOBALS['egw_info']['server']['max_access_log_age']))
{
$GLOBALS['egw_info']['server']['max_access_log_age'] = 90; // default 90 days
$save_rep = true;
}
if (!isset($GLOBALS['egw_info']['server']['block_time']))
{
$GLOBALS['egw_info']['server']['block_time'] = 5; // default 5min
$save_rep = true;
}
if (!isset($GLOBALS['egw_info']['server']['num_unsuccessful_id']))
{
$GLOBALS['egw_info']['server']['num_unsuccessful_id'] = 3; // default 3 trys per id
$save_rep = true;
}
if (!isset($GLOBALS['egw_info']['server']['num_unsuccessful_ip']))
{
$GLOBALS['egw_info']['server']['num_unsuccessful_ip'] = $GLOBALS['egw_info']['server']['num_unsuccessful_id']; // default same as for id
$save_rep = true;
}
if (!isset($GLOBALS['egw_info']['server']['install_id']))
{
$GLOBALS['egw_info']['server']['install_id'] = md5(common::randomstring(15));
}
if (!isset($GLOBALS['egw_info']['server']['sessions_timeout']))
{
$GLOBALS['egw_info']['server']['sessions_timeout'] = 14400;
$save_rep = true;
}
if (!isset($GLOBALS['egw_info']['server']['max_history']))
{
$GLOBALS['egw_info']['server']['max_history'] = 20;
$save_rep = true;
}
if ($save_rep)
{
$config = new config('phpgwapi');
$config->read_repository();
$config->value('max_access_log_age',$GLOBALS['egw_info']['server']['max_access_log_age']);
$config->value('block_time',$GLOBALS['egw_info']['server']['block_time']);
$config->value('num_unsuccessful_id',$GLOBALS['egw_info']['server']['num_unsuccessful_id']);
$config->value('num_unsuccessful_ip',$GLOBALS['egw_info']['server']['num_unsuccessful_ip']);
$config->value('install_id',$GLOBALS['egw_info']['server']['install_id']);
$config->value('sessions_timeout',$GLOBALS['egw_info']['server']['sessions_timeout']);
$config->value('max_history',$GLOBALS['egw_info']['server']['max_history']);
$config->save_repository();
}
self::set_cookiedomain();
ini_set('session.gc_maxlifetime', $GLOBALS['egw_info']['server']['sessions_timeout']);
}
/**
* Magic function called when this class get's restored from the session
*
*/
function __wakeup()
{
ini_set('session.gc_maxlifetime', $GLOBALS['egw_info']['server']['sessions_timeout']);
}
/**
* Destructor
*
*/
function __destruct()
{
self::encrypt($this->kp3);
}
/**
* commit the sessiondata to storage
*
* It's necessary to use this function instead of session_write_close() direct, as otherwise the session is not encrypted!
*/
function commit_session()
{
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__."() sessionid=$this->sessionid, _SESSION[".self::EGW_SESSION_VAR.']='.array2string($_SESSION[self::EGW_SESSION_VAR]));
self::encrypt($this->kp3);
session_write_close();
}
/**
* Keys of session variables which get encrypted
*
* @var array
*/
static $egw_session_vars = array(
//self::EGW_SESSION_VAR, no need to encrypt and required by the session list
self::EGW_APPSESSION_VAR,
self::EGW_INFO_CACHE,
self::EGW_OBJECT_CACHE,
);
static $mcrypt;
/**
* Name of flag in session to signal it is encrypted or not
*/
const EGW_SESSION_ENCRYPTED = 'egw_session_encrypted';
/**
* Encrypt the variables in the session
*
* Is called by self::__destruct().
*/
static function encrypt($kp3)
{
// switch that on to analyse memory usage in the session
//self::log_session_usage($_SESSION[self::EGW_APPSESSION_VAR],'_SESSION['.self::EGW_APPSESSION_VAR.']',true,5000);
if (!isset($_SESSION[self::EGW_SESSION_ENCRYPTED]) && self::init_crypt($kp3))
{
foreach(self::$egw_session_vars as $name)
{
if (isset($_SESSION[$name]))
{
$_SESSION[$name] = mcrypt_generic(self::$mcrypt,serialize($_SESSION[$name]));
//error_log(__METHOD__."() 'encrypting' session var: $name, len=".strlen($_SESSION[$name]));
}
}
$_SESSION[self::EGW_SESSION_ENCRYPTED] = true; // flag session as encrypted
mcrypt_generic_deinit(self::$mcrypt);
self::$mcrypt = null;
}
}
/**
* Log the usage of session-vars
*
* @param array &$arr
* @param string $label
* @param boolean $recursion=true if true call itself for every item > $limit
* @param int $limit=1000 log only differences > $limit
*/
static function log_session_usage(&$arr,$label,$recursion=true,$limit=1000)
{
if (!is_array($arr)) return;
$sizes = array();
foreach($arr as $key => &$data)
{
$sizes[$key] = strlen(serialize($data));
}
arsort($sizes,SORT_NUMERIC);
foreach($sizes as $key => $size)
{
$diff = $size - (int)$_SESSION[$label.'-sizes'][$key];
$_SESSION[$label.'-sizes'][$key] = $size;
if ($diff > $limit)
{
error_log("strlen({$label}[$key])=".egw_vfs::hsize($size).", diff=".egw_vfs::hsize($diff));
if ($recursion) self::log_session_usage($arr[$key],$label.'['.$key.']',$recursion,$limit);
}
}
}
/**
* Decrypt the variables in the session
*
* Is called by self::init_handler from phpgwapi/inc/functions.inc.php (called from the header.inc.php)
* before the restore of the eGW enviroment takes place, so that the whole thing can be encrypted
*/
static function decrypt()
{
if ($_SESSION[self::EGW_SESSION_ENCRYPTED] && self::init_crypt($_REQUEST['kp3']))
{
foreach(self::$egw_session_vars as $name)
{
if (isset($_SESSION[$name]))
{
$_SESSION[$name] = unserialize(trim(mdecrypt_generic(self::$mcrypt,$_SESSION[$name])));
//error_log(__METHOD__."() 'decrypting' session var $name: gettype($name) = ".gettype($_SESSION[$name]));
}
}
unset($_SESSION[self::EGW_SESSION_ENCRYPTED]); // delete encryption flag
}
}
/**
* Check if session encryption is configured, possible and initialise it
*
* @param string $kp3 mcrypt key transported via cookie or get parameter like the session id,
* unlike the session id it's not know on the server, so only the client-request can decrypt the session!
* @param string $algo='tripledes'
* @param string $mode='ecb'
* @return boolean true if encryption is used, false otherwise
*/
static private function init_crypt($kp3,$algo='tripledes',$mode='ecb')
{
if(!$GLOBALS['egw_info']['server']['mcrypt_enabled'])
{
return false; // session encryption is switched off
}
if ($GLOBALS['egw_info']['currentapp'] == 'syncml' || !$kp3)
{
$kp3 = 'staticsyncmlkp3'; // syncml has no kp3!
}
if (is_null(self::$mcrypt))
{
if (!check_load_extension('mcrypt'))
{
error_log(__METHOD__."() required PHP extension mcrypt not loaded and can not be loaded, sessions get NOT encrypted!");
return false;
}
if (!(self::$mcrypt = mcrypt_module_open($algo, '', $mode, '')))
{
error_log(__METHOD__."() could not mcrypt_module_open(algo='$algo','',mode='$mode',''), sessions get NOT encrypted!");
return false;
}
$iv_size = mcrypt_enc_get_iv_size(self::$mcrypt);
$iv = !isset($GLOBALS['egw_info']['server']['mcrypt_iv']) || strlen($GLOBALS['egw_info']['server']['mcrypt_iv']) < $iv_size ?
mcrypt_create_iv ($iv_size, MCRYPT_RAND) : substr($GLOBALS['egw_info']['server']['mcrypt_iv'],0,$iv_size);
if (mcrypt_generic_init(self::$mcrypt,$kp3, $iv) < 0)
{
error_log(__METHOD__."() could not initialise mcrypt, sessions get NOT encrypted!");
return self::$mcrypt = false;
}
}
return is_resource(self::$mcrypt);
}
/**
* Create a new eGW session
*
* @param string $login user login
* @param string $passwd user password
* @param string $passwd_type type of password being used, ie plaintext, md5, sha1
* @param boolean $no_session_needed=false dont create a real session, eg. for GroupDAV clients using only basic auth, no cookie support
* @param boolean $auth_check=true if false, the user is loged in without checking his password (eg. for single sign on), default = true
* @return string session id
*/
function create($login,$passwd = '',$passwd_type = '',$no_session=false,$auth_check=true)
{
if (is_array($login))
{
$this->login = $login['login'];
$this->passwd = $login['passwd'];
$this->passwd_type = $login['passwd_type'];
$login = $this->login;
}
else
{
$this->login = $login;
$this->passwd = $passwd;
$this->passwd_type = $passwd_type;
}
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__."($this->login,$this->passwd,$this->passwd_type,$no_session,$auth_check)");
self::split_login_domain($login,$this->account_lid,$this->account_domain);
// add domain to the login, if not already there
if (substr($this->login,-strlen($this->account_domain)-1) != '@'.$this->account_domain)
{
$this->login .= '@'.$this->account_domain;
}
$now = time();
//error_log(__METHOD__."($login,$passwd,$passwd_type,$no_session,$auth_check) account_lid=$this->account_lid, account_domain=$this->account_domain, default_domain={$GLOBALS['egw_info']['server']['default_domain']}, user/domain={$GLOBALS['egw_info']['user']['domain']}");
// This is to ensure that we authenticate to the correct domain (might not be default)
// if no domain is given we use the default domain, so we dont need to re-create everything
if (!$GLOBALS['egw_info']['user']['domain'] && $this->account_domain == $GLOBALS['egw_info']['server']['default_domain'])
{
$GLOBALS['egw_info']['user']['domain'] = $this->account_domain;
}
elseif (!$this->account_domain && $GLOBALS['egw_info']['user']['domain'])
{
$this->account_domain = $GLOBALS['egw_info']['user']['domain'];
}
elseif($this->account_domain != $GLOBALS['egw_info']['user']['domain'])
{
throw new Exception("Wrong domain! '$this->account_domain' != '{$GLOBALS['egw_info']['user']['domain']}'");
/* $GLOBALS['egw']->ADOdb = null;
$GLOBALS['egw_info']['user']['domain'] = $this->account_domain;
// reset the db and all other (non-header!) egw_info/server data
$GLOBALS['egw_info']['server'] = array(
'sessions_type' => $GLOBALS['egw_info']['server']['sessions_type'],
'default_domain' => $GLOBALS['egw_info']['server']['default_domain'],
);
$GLOBALS['egw_info']['server']['db_host'] = $GLOBALS['egw_domain'][$this->account_domain]['db_host'];
$GLOBALS['egw_info']['server']['db_port'] = $GLOBALS['egw_domain'][$this->account_domain]['db_port'];
$GLOBALS['egw_info']['server']['db_name'] = $GLOBALS['egw_domain'][$this->account_domain]['db_name'];
$GLOBALS['egw_info']['server']['db_user'] = $GLOBALS['egw_domain'][$this->account_domain]['db_user'];
$GLOBALS['egw_info']['server']['db_pass'] = $GLOBALS['egw_domain'][$this->account_domain]['db_pass'];
$GLOBALS['egw_info']['server']['db_type'] = $GLOBALS['egw_domain'][$this->account_domain]['db_type'];
$GLOBALS['egw']->setup('',false);
*/
}
unset($GLOBALS['egw_info']['server']['default_domain']); // we kill this for security reasons
//echo "<p>session::create(login='$login'): lid='$this->account_lid', domain='$this->account_domain'</p>\n";
$user_ip = self::getuser_ip();
$this->account_id = $GLOBALS['egw']->accounts->name2id($this->account_lid,'account_lid','u');
if (($blocked = $this->login_blocked($login,$user_ip)) || // too many unsuccessful attempts
$GLOBALS['egw_info']['server']['global_denied_users'][$this->account_lid] ||
$auth_check && !$GLOBALS['egw']->auth->authenticate($this->account_lid, $this->passwd, $this->passwd_type) ||
$this->account_id && $GLOBALS['egw']->accounts->get_type($this->account_id) == 'g')
{
$this->reason = $blocked ? 'blocked, too many attempts' : 'bad login or password';
$this->cd_reason = $blocked ? 99 : 5;
// we dont log anon users as it would block the website
if (!$GLOBALS['egw']->acl->get_specific_rights_for_account($this->account_id,'anonymous','phpgwapi'))
{
$this->log_access($this->reason,$login,$user_ip,0); // log unsuccessfull login
}
return false;
}
if (!$this->account_id && $GLOBALS['egw_info']['server']['auto_create_acct'])
{
if ($GLOBALS['egw_info']['server']['auto_create_acct'] == 'lowercase')
{
$this->account_lid = strtolower($this->account_lid);
}
$this->account_id = $GLOBALS['egw']->accounts->auto_add($this->account_lid, $passwd);
}
$GLOBALS['egw_info']['user']['account_id'] = $this->account_id;
$GLOBALS['egw']->accounts->accounts($this->account_id);
// for WebDAV and GroupDAV we use a pseudo sessionid created from md5(user:passwd)
// --> allows this stateless protocolls which use basic auth to use sessions!
if ($this->sessionid = self::get_sessionid(true))
{
$no_session = true; // no need to set cookie
session_id($this->sessionid);
}
else
{
session_start();
// set a new session-id, if not syncml (already done in Horde code and can NOT be changed)
if (!$no_session && $GLOBALS['egw_info']['flags']['currentapp'] != 'syncml')
{
session_regenerate_id(true);
}
$this->sessionid = session_id();
}
$this->kp3 = common::randomstring(24);
$this->read_repositories();
if ($GLOBALS['egw']->accounts->is_expired($this->user))
{
if(is_object($GLOBALS['egw']->log))
{
$GLOBALS['egw']->log->message(array(
'text' => 'W-LoginFailure, account loginid %1 is expired',
'p1' => $this->account_lid,
'line' => __LINE__,
'file' => __FILE__
));
$GLOBALS['egw']->log->commit();
}
$this->reason = 'account is expired';
$this->cd_reason = 98;
return false;
}
$GLOBALS['egw_info']['user'] = $this->user;
$this->appsession('password','phpgwapi',base64_encode($this->passwd));
if ($GLOBALS['egw']->acl->check('anonymous',1,'phpgwapi'))
{
$this->session_flags = 'A';
}
else
{
$this->session_flags = 'N';
}
if (($hook_result = $GLOBALS['egw']->hooks->process(array(
'location' => 'session_creation',
'sessionid' => $this->sessionid,
'session_flags' => $this->session_flags,
'account_id' => $this->account_id,
'account_lid' => $this->account_lid,
'passwd' => $this->passwd,
'account_domain' => $this->account_domain,
'user_ip' => $user_ip,
),'',true))) // true = run hooks from all apps, not just the ones the current user has perms to run
{
foreach($hook_result as $app => $reason)
{
if ($reason) // called hook requests to deny the session
{
$this->reason = $this->cd_reason = $reason;
$this->log_access($this->reason,$login,$user_ip,0 ); // log unsuccessfull login
return false;
}
}
}
$GLOBALS['egw']->db->transaction_begin();
$this->register_session($this->login,$user_ip,$now,$this->session_flags);
if ($this->session_flags != 'A') // dont log anonymous sessions
{
$this->log_access($this->sessionid,$login,$user_ip,$this->account_id);
}
self::appsession('account_previous_login','phpgwapi',$GLOBALS['egw']->auth->previous_login);
$GLOBALS['egw']->accounts->update_lastlogin($this->account_id,$user_ip);
$GLOBALS['egw']->db->transaction_commit();
if ($GLOBALS['egw_info']['server']['usecookies'] && !$no_session)
{
self::egw_setcookie(self::EGW_SESSION_NAME,$this->sessionid);
self::egw_setcookie('kp3',$this->kp3);
self::egw_setcookie('domain',$this->account_domain);
}
if ($GLOBALS['egw_info']['server']['usecookies'] && !$no_session || isset($_COOKIE['last_loginid']))
{
self::egw_setcookie('last_loginid', $this->account_lid ,$now+1209600); /* For 2 weeks */
self::egw_setcookie('last_domain',$this->account_domain,$now+1209600);
}
//if (!$this->sessionid) echo "<p>session::create(login='$login') = '$this->sessionid': lid='$this->account_lid', domain='$this->account_domain'</p>\n";
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__."($this->login,$this->passwd,$this->passwd_type,$no_session,$auth_check) successfull sessionid=$this->sessionid");
return $this->sessionid;
}
/**
* Store eGW specific session-vars
*
* @param string $login
* @param string $user_ip
* @param int $now
* @param string $session_flags
*/
private function register_session($login,$user_ip,$now,$session_flags)
{
// restore session vars set before session was started
if (is_array($this->required_files))
{
$_SESSION[self::EGW_REQUIRED_FILES] = !is_array($_SESSION[self::EGW_REQUIRED_FILES]) ? $this->required_files :
array_unique(array_merge($_SESSION[self::EGW_REQUIRED_FILES],$this->required_files));
unset($this->required_files);
}
$_SESSION[self::EGW_SESSION_VAR] = array(
'session_id' => $this->sessionid,
'session_lid' => $login,
'session_ip' => $user_ip,
'session_logintime' => $now,
'session_dla' => $now,
'session_action' => $_SERVER['PHP_SELF'],
'session_flags' => $session_flags,
// we need the install-id to differ between serveral installs shareing one tmp-dir
'session_install_id' => $GLOBALS['egw_info']['server']['install_id']
);
}
/**
* name of access-log table
*/
const ACCESS_LOG_TABLE = 'egw_access_log';
/**
* Write or update (for logout) the access_log
*
* @param string $sessionid id of session or 0 for unsuccessful logins
* @param string $login account_lid (evtl. with domain) or '' for settion the logout-time
* @param string $user_ip ip to log
* @param int $account_id numerical account_id
*/
private function log_access($sessionid,$login='',$user_ip='',$account_id='')
{
$now = time();
if ($login)
{
$GLOBALS['egw']->db->insert(self::ACCESS_LOG_TABLE,array(
'sessionid' => $sessionid,
'loginid' => $login,
'ip' => $user_ip,
'li' => $now,
'lo' => 0,
'account_id'=> $account_id,
),false,__LINE__,__FILE__);
}
else
{
$GLOBALS['egw']->db->update(self::ACCESS_LOG_TABLE,array('lo' => $now),array('sessionid' => $sessionid),__LINE__,__FILE__);
}
if ($GLOBALS['egw_info']['server']['max_access_log_age'])
{
$max_age = $now - $GLOBALS['egw_info']['server']['max_access_log_age'] * 24 * 60 * 60;
$GLOBALS['egw']->db->delete(self::ACCESS_LOG_TABLE,"li < $max_age",__LINE__,__FILE__);
}
}
/**
* Protect against brute force attacks, block login if too many unsuccessful login attmepts
*
* @param string $login account_lid (evtl. with domain)
* @param string $ip ip of the user
* @returns bool login blocked?
*/
private function login_blocked($login,$ip)
{
$blocked = false;
$block_time = time() - $GLOBALS['egw_info']['server']['block_time'] * 60;
if (($false_ip = $GLOBALS['egw']->db->select(self::ACCESS_LOG_TABLE,'COUNT(*)',array(
'account_id = 0',
'ip' => $ip,
"li > $block_time",
),__LINE__,__FILE__)->fetchSingle()) > $GLOBALS['egw_info']['server']['num_unsuccessful_ip'])
{
//echo "<p>login_blocked: ip='$ip' ".$this->db->f(0)." trys (".$GLOBALS['egw_info']['server']['num_unsuccessful_ip']." max.) since ".date('Y/m/d H:i',$block_time)."</p>\n";
$blocked = true;
}
if (($false_id = $GLOBALS['egw']->db->select(self::ACCESS_LOG_TABLE,'COUNT(*)',array(
'account_id = 0',
'(loginid = '.$GLOBALS['egw']->db->quote($login).' OR loginid LIKE '.$GLOBALS['egw']->db->quote($login.'@%').')',
"li > $block_time",
),__LINE__,__FILE__)->fetchSingle()) > $GLOBALS['egw_info']['server']['num_unsuccessful_id'])
{
//echo "<p>login_blocked: login='$login' ".$this->db->f(0)." trys (".$GLOBALS['egw_info']['server']['num_unsuccessful_id']." max.) since ".date('Y/m/d H:i',$block_time)."</p>\n";
$blocked = true;
}
if ($blocked && $GLOBALS['egw_info']['server']['admin_mails'] &&
$GLOBALS['egw_info']['server']['login_blocked_mail_time'] < time()-5*60) // max. one mail every 5mins
{
// notify admin(s) via email
$from = 'eGroupWare@'.$GLOBALS['egw_info']['server']['mail_suffix'];
$subject = lang("eGroupWare: login blocked for user '%1', IP %2",$login,$ip);
$body = lang("Too many unsucessful attempts to login: %1 for the user '%2', %3 for the IP %4",$false_id,$login,$false_ip,$ip);
$subject = $GLOBALS['egw']->send->encode_subject($subject);
$admin_mails = explode(',',$GLOBALS['egw_info']['server']['admin_mails']);
foreach($admin_mails as $to)
{
$GLOBALS['egw']->send->msg('email',$to,$subject,$body,'','','',$from,$from);
}
// save time of mail, to not send to many mails
$config = new config('phpgwapi');
$config->read_repository();
$config->value('login_blocked_mail_time',time());
$config->save_repository();
}
return $blocked;
}
/**
* Get the sessionid from Cookie, Get-Parameter or basic auth
*
* @param boolean $only_basic_auth=false return only a basic auth pseudo sessionid, default no
* @return string
*/
static function get_sessionid($only_basic_auth=false)
{
// for WebDAV and GroupDAV we use a pseudo sessionid created from md5(user:passwd)
// --> allows this stateless protocolls which use basic auth to use sessions!
if (isset($_SERVER['PHP_AUTH_USER']) && isset($_SERVER['PHP_AUTH_PW']) &&
in_array(basename($_SERVER['SCRIPT_NAME']),array('webdav.php','groupdav.php')))
{
// we generate a pseudo-sessionid from the basic auth credentials
$sessionid = md5($_SERVER['PHP_AUTH_USER'].':'.$_SERVER['PHP_AUTH_PW'].':'.$_SERVER['HTTP_HOST']);
}
elseif(!$only_basic_auth && isset($_REQUEST[self::EGW_SESSION_NAME]))
{
$sessionid = $_REQUEST[self::EGW_SESSION_NAME];
}
else
{
$sessionid = false;
}
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__.'() returning '.array2string($sessionid));
return $sessionid;
}
/**
* Check to see if a session is still current and valid
*
* @param string $sessionid session id to be verfied
* @param string $kp3 ?? to be verified
* @return bool is the session valid?
*/
function verify($sessionid=null,$kp3=null)
{
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__."('$sessionid','$kp3') ".function_backtrace());
$fill_egw_info_and_repositories = !$GLOBALS['egw_info']['flags']['restored_from_session'];
if(!$sessionid)
{
$sessionid = self::get_sessionid();
$kp3 = $_REQUEST['kp3'];
}
$this->sessionid = $sessionid;
$this->kp3 = $kp3;
if (!$this->sessionid)
{
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__."('$sessionid')_REQUEST[sessionid]='$_REQUEST[sessionid]' No session ID");
return false;
}
session_name(self::EGW_SESSION_NAME);
session_id($this->sessionid);
session_start();
// check if we have a eGroupware session --> return false if not (but dont destroy it!)
if (is_null($_SESSION) || !isset($_SESSION[self::EGW_SESSION_VAR]))
{
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__."('$sessionid') session does NOT exist!");
return false;
}
$session =& $_SESSION[self::EGW_SESSION_VAR];
if ($session['session_dla'] <= time() - $GLOBALS['egw_info']['server']['sessions_timeout'])
{
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__."('$sessionid') session timed out!");
$this->destroy($sessionid,$kp3);
return false;
}
$this->session_flags = $session['session_flags'];
$this->split_login_domain($session['session_lid'],$this->account_lid,$this->account_domain);
// This is to ensure that we authenticate to the correct domain (might not be default)
if($GLOBALS['egw_info']['user']['domain'] && $this->account_domain != $GLOBALS['egw_info']['user']['domain'])
{
throw new Exception("Wrong domain! '$this->account_domain' != '{$GLOBALS['egw_info']['user']['domain']}'");
/* if (self::ERROR_LOG_DEBUG) error_log(__METHOD__."('$sessionid','$kp3') account_domain='$this->account_domain' != '{$GLOBALS['egw_info']['user']['domain']}'=egw_info[user][domain]");
$GLOBALS['egw']->ADOdb = null;
$GLOBALS['egw_info']['user']['domain'] = $this->account_domain;
// reset the db
$GLOBALS['egw_info']['server']['db_host'] = $GLOBALS['egw_domain'][$this->account_domain]['db_host'];
$GLOBALS['egw_info']['server']['db_port'] = $GLOBALS['egw_domain'][$this->account_domain]['db_port'];
$GLOBALS['egw_info']['server']['db_name'] = $GLOBALS['egw_domain'][$this->account_domain]['db_name'];
$GLOBALS['egw_info']['server']['db_user'] = $GLOBALS['egw_domain'][$this->account_domain]['db_user'];
$GLOBALS['egw_info']['server']['db_pass'] = $GLOBALS['egw_domain'][$this->account_domain]['db_pass'];
$GLOBALS['egw_info']['server']['db_type'] = $GLOBALS['egw_domain'][$this->account_domain]['db_type'];
$GLOBALS['egw']->setup('',false);
*/
}
$GLOBALS['egw_info']['user']['kp3'] = $this->kp3;
// allow xajax / notifications to not update the dla, so sessions can time out again
if (!isset($GLOBALS['egw_info']['flags']['no_dla_update']) || !$GLOBALS['egw_info']['flags']['no_dla_update'])
{
$this->update_dla();
}
$this->account_id = $GLOBALS['egw']->accounts->name2id($this->account_lid,'account_lid','u');
if (!$this->account_id)
{
if (self::ERROR_LOG_DEBUG) error_log("*** session::verify($sessionid) !accounts::name2id('$this->account_lid')");
return false;
}
$GLOBALS['egw_info']['user']['account_id'] = $this->account_id;
if ($fill_egw_info_and_repositories)
{
$this->read_repositories();
}
if ($this->user['expires'] != -1 && $this->user['expires'] < time())
{
if (self::ERROR_LOG_DEBUG) error_log("*** session::verify($sessionid) accounts is expired");
if(is_object($GLOBALS['egw']->log))
{
$GLOBALS['egw']->log->message(array(
'text' => 'W-VerifySession, account loginid %1 is expired',
'p1' => $this->account_lid,
'line' => __LINE__,
'file' => __FILE__
));
$GLOBALS['egw']->log->commit();
}
return false;
}
if ($fill_egw_info_and_repositories)
{
$GLOBALS['egw_info']['user'] = $this->user;
$GLOBALS['egw_info']['user']['session_ip'] = $session['session_ip'];
$GLOBALS['egw_info']['user']['passwd'] = base64_decode($this->appsession('password','phpgwapi'));
}
if ($this->account_domain != $GLOBALS['egw_info']['user']['domain'])
{
if (self::ERROR_LOG_DEBUG) error_log("*** session::verify($sessionid) wrong domain");
if(is_object($GLOBALS['egw']->log))
{
$GLOBALS['egw']->log->message(array(
'text' => 'W-VerifySession, the domains %1 and %2 don\'t match',
'p1' => $userid_array[1],
'p2' => $GLOBALS['egw_info']['user']['domain'],
'line' => __LINE__,
'file' => __FILE__
));
$GLOBALS['egw']->log->commit();
}
return false;
}
if ($GLOBALS['egw_info']['server']['sessions_checkip'])
{
if (self::ERROR_LOG_DEBUG) error_log("*** session::verify($sessionid) wrong IP");
if (strtoupper(substr(PHP_OS,0,3)) != 'WIN' && (!$GLOBALS['egw_info']['user']['session_ip'] ||
$GLOBALS['egw_info']['user']['session_ip'] != $this->getuser_ip()))
{
if(is_object($GLOBALS['egw']->log))
{
// This needs some better wording
$GLOBALS['egw']->log->message(array(
'text' => 'W-VerifySession, IP %1 doesn\'t match IP %2 in session table',
'p1' => $this->getuser_ip(),
'p2' => $GLOBALS['egw_info']['user']['session_ip'],
'line' => __LINE__,
'file' => __FILE__
));
$GLOBALS['egw']->log->commit();
}
return false;
}
}
if ($fill_egw_info_and_repositories)
{
$GLOBALS['egw']->acl->acl($this->account_id);
accounts::getInstance()->setAccountId($this->account_id);
$GLOBALS['egw']->preferences->preferences($this->account_id);
$GLOBALS['egw']->applications->applications($this->account_id);
}
if (!$this->account_lid)
{
if (self::ERROR_LOG_DEBUG) error_log("*** session::verify($sessionid) !account_lid");
if(is_object($GLOBALS['egw']->log))
{
// This needs some better wording
$GLOBALS['egw']->log->message(array(
'text' => 'W-VerifySession, account_id is empty',
'line' => __LINE__,
'file' => __FILE__
));
$GLOBALS['egw']->log->commit();
}
//echo 'DEBUG: Sessions: account_id is empty!<br>'."\n";
return false;
}
// if user is anonymous and enters a not allowed application its session will be destroyed inmediatly.
$_current_app=$GLOBALS['egw_info']['flags']['currentapp'];
if($this->session_flags=='A' && !$GLOBALS['egw_info']['user']['apps'][$_current_app])
{
if (self::ERROR_LOG_DEBUG) error_log("*** session::verify($sessionid) anon user entering not allowed app");
$this->destroy($sessionid,$kp3);
/* Overwrite Cookie with empty user. For 2 weeks */
self::egw_setcookie(self::EGW_SESSION_NAME,'');
self::egw_setcookie('kp3','');
self::egw_setcookie('domain','');
self::egw_setcookie('last_domain','');
self::egw_setcookie('last_loginid', '');
return false;
}
if (self::ERROR_LOG_DEBUG) error_log("--> session::verify($sessionid) SUCCESS");
return true;
}
/**
* Terminate a session
*
* @param string $sessionid the id of the session to be terminated
* @param string $kp3
* @return boolean true on success, false on error
*/
function destroy($sessionid, $kp3)
{
if (!$sessionid && $kp3)
{
return false;
}
$this->log_access($this->sessionid); // log logout-time
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__."($sessionid,$kp3) parent::destroy()=$ret");
$GLOBALS['egw']->hooks->process(array(
'location' => 'session_destroyed',
'sessionid' => $sessionid,
),'',true); // true = run hooks from all apps, not just the ones the current user has perms to run
// Only do the following, if where working with the current user
if (!$GLOBALS['egw_info']['user']['sessionid'] || $sessionid == $GLOBALS['egw_info']['user']['sessionid'])
{
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__." ********* about to call session_destroy!");
session_unset();
//echo '<p>'.__METHOD__.": session_destroy() returned ".(session_destroy() ? 'true' : 'false')."</p>\n";
@session_destroy();
// we need to (re-)load the eGW session-handler, as session_destroy unloads custom session-handlers
if (function_exists('init_session_handler'))
{
init_session_handler();
}
if ($GLOBALS['egw_info']['server']['usecookies'])
{
self::egw_setcookie(session_name());
}
}
else
{
$sessions = self::session_list(0,'','',true);
if (isset($sessions[$sessionid]) && session_module_name() == 'files')
{
//echo '<p>'.__METHOD__."($session_id): unlink('".$sessions[$sessionid]['php_session_file']."')</p>\n";
@unlink($sessions[$sessionid]['php_session_file']);
}
}
return true;
}
/**
* Generate a url which supports url or cookies based sessions
*
* Please note, the values of the query get url encoded!
*
* @param string $url a url relative to the egroupware install root, it can contain a query too
* @param array/string $extravars query string arguements as string or array (prefered)
* @return string generated url
*/
public static function link($url, $extravars = '')
{
//echo '<p>'.__METHOD__."(url='$url',extravars='".array2string($extravars)."')";
if ($url[0] != '/')
{
$app = $GLOBALS['egw_info']['flags']['currentapp'];
if ($app != 'login' && $app != 'logout')
{
$url = $app.'/'.$url;
}
}
// append the url to the webserver url, but avoid more then one slash between the parts of the url
if ($url[0] != '/' || $GLOBALS['egw_info']['server']['webserver_url'] != '/')
{
if($url[0] != '/' && substr($GLOBALS['egw_info']['server']['webserver_url'],-1) != '/')
{
$url = $GLOBALS['egw_info']['server']['webserver_url'] .'/'. $url;
}
else
{
$url = $GLOBALS['egw_info']['server']['webserver_url'] . $url;
}
}
if(isset($GLOBALS['egw_info']['server']['enforce_ssl']) && $GLOBALS['egw_info']['server']['enforce_ssl'])
{
if(substr($url ,0,4) != 'http')
{
$url = 'https://'.$GLOBALS['egw_info']['server']['hostname'].$url;
}
else
{
$url = str_replace ( 'http:', 'https:', $url);
}
}
$vars = array();
// add session params if not using cookies
if (!$GLOBALS['egw_info']['server']['usecookies'])
{
$vars[self::EGW_SESSION_NAME] = $GLOBALS['egw']->session->sessionid;
$vars['kp3'] = $GLOBALS['egw']->session->kp3;
$vars['domain'] = $GLOBALS['egw']->session->account_domain;
}
// check if the url already contains a query and ensure that vars is an array and all strings are in extravars
list($url,$othervars) = explode('?',$url);
if ($extravars && is_array($extravars))
{
$vars += $extravars;
$extravars = $othervars;
}
else
{
if ($othervars) $extravars .= ($extravars?'&':'').$othervars;
}
// parse extravars string into the vars array
if ($extravars)
{
foreach(explode('&',$extravars) as $expr)
{
list($var,$val) = explode('=', $expr,2);
if (substr($var,-2) == '[]')
{
$vars[substr($var,0,-2)][] = $val;
}
else
{
$vars[$var] = $val;
}
}
}
// if there are vars, we add them urlencoded to the url
if (count($vars))
{
$query = array();
foreach($vars as $key => $value)
{
if (is_array($value))
{
foreach($value as $val)
{
$query[] = $key.'[]='.urlencode($val);
}
}
else
{
$query[] = $key.'='.urlencode($value);
}
}
$url .= '?' . implode('&',$query);
}
//echo " = '$url'</p>\n";
return $url;
}
/**
* Stores or retrieve applications data in/form the eGW session
*
* @param string $location free lable to store the data
* @param string $appname='' default current application (egw_info[flags][currentapp])
* @param mixed $data='##NOTHING##' if given, data to store, if not specified
* @return mixed session data or false if no data stored for $appname/$location
*/
public static function &appsession($location = 'default', $appname = '', $data = '##NOTHING##')
{
if (isset($_SESSION[self::EGW_SESSION_ENCRYPTED]))
{
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__.' called after session was encrypted --> ignored!');
return false; // can no longer store something in the session, eg. because commit_session() was called
}
if (!$appname)
{
$appname = $GLOBALS['egw_info']['flags']['currentapp'];
}
// allow to store eg. '' as the value.
if ($data === '##NOTHING##')
{
if(isset($_SESSION[self::EGW_APPSESSION_VAR][$appname]) && array_key_exists($location,$_SESSION[self::EGW_APPSESSION_VAR][$appname]))
{
$ret =& $_SESSION[self::EGW_APPSESSION_VAR][$appname][$location];
}
else
{
$ret = false;
}
}
else
{
$_SESSION[self::EGW_APPSESSION_VAR][$appname][$location] =& $data;
$ret =& $_SESSION[self::EGW_APPSESSION_VAR][$appname][$location];
}
if (self::ERROR_LOG_DEBUG === 'appsession')
{
error_log(__METHOD__."($location,$appname,$data) === ".(is_scalar($ret) && strlen($ret) < 50 ?
(is_bool($ret) ? ($ret ? '(bool)true' : '(bool)false') : $ret) :
(strlen($r = array2string($ret)) < 50 ? $r : substr($r,0,50).' ...')));
}
return $ret;
}
/**
* Get the ip address of current users
*
* @return string ip address
*/
public static function getuser_ip()
{
return isset($_SERVER['HTTP_X_FORWARDED_FOR']) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : $_SERVER['REMOTE_ADDR'];
}
/**
* domain for cookies
*
* @var string
*/
private static $cookie_domain = '';
/**
* path for cookies
*
* @var string
*/
private static $cookie_path = '/';
/**
* Set a cookie with eGW's cookie-domain and -path settings
*
* @param string $cookiename name of cookie to be set
* @param string $cookievalue='' value to be used, if unset cookie is cleared (optional)
* @param int $cookietime=0 when cookie should expire, 0 for session only (optional)
* @param string $cookiepath=null optional path (eg. '/') if the eGW install-dir should not be used
*/
public static function egw_setcookie($cookiename,$cookievalue='',$cookietime=0,$cookiepath=null)
{
if (!isset(self::$cookie_domain) || !isset(self::$cookie_path))
{
self::set_cookiedomain();
}
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__."($cookiename,$cookievalue,$cookietime,$cookiepath,self::$cookie_domain)");
setcookie($cookiename,$cookievalue,$cookietime,is_null($cookiepath) ? self::$cookie_path : $cookiepath,self::$cookie_domain);
}
/**
* Set the domain and path used for cookies
*/
private static function set_cookiedomain()
{
if ($GLOBALS['egw_info']['server']['cookiedomain'])
{
// Admin set domain, eg. .domain.com to allow egw.domain.com and www.domain.com
self::$cookie_domain = $GLOBALS['egw_info']['server']['cookiedomain'];
}
else
{
// Use HTTP_X_FORWARDED_HOST if set, which is the case behind a none-transparent proxy
self::$cookie_domain = isset($_SERVER['HTTP_X_FORWARDED_HOST']) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : $_SERVER['HTTP_HOST'];
}
// remove port from HTTP_HOST
if (preg_match("/^(.*):(.*)$/",self::$cookie_domain,$arr))
{
self::$cookie_domain = $arr[1];
}
if (count(explode('.',self::$cookie_domain)) <= 1)
{
// setcookie dont likes domains without dots, leaving it empty, gets setcookie to fill the domain in
self::$cookie_domain = '';
}
if (!$GLOBALS['egw_info']['server']['cookiepath'] ||
!(self::$cookie_path = parse_url($GLOBALS['egw_info']['server']['webserver_url'],PHP_URL_PATH)))
{
self::$cookie_path = '/';
}
//echo "<p>cookie_path='self::$cookie_path', cookie_domain='self::$cookie_domain'</p>\n";
session_set_cookie_params(0,$path,$domain);
}
/**
* Search the instance matching the request
*
* @param string $login on login $_POST['login'], $_SERVER['PHP_AUTH_USER'] or $_SERVER['REMOTE_USER']
* @param string $domain_requested usually $_REQUEST['domain']
* @param string &$default_domain usually $default_domain get's set eg. by sitemgr
* @param string $server_name usually $_SERVER['SERVER_NAME']
* @param array $domains=null defaults to $GLOBALS['egw_domain'] from the header
* @return string $GLOBALS['egw_info']['user']['domain'] set with the domain/instance to use
*/
public static function search_instance($login,$domain_requested,&$default_domain,$server_name,array $domains=null)
{
if (is_null($domains)) $domains = $GLOBALS['egw_domain'];
if (!isset($default_domain) || !isset($domains[$default_domain])) // allow to overwrite the default domain
{
if(isset($domains[$server_name]))
{
$default_domain = $server_name;
}
else
{
$domain_part = explode('.',$server_name);
array_shift($domain_part);
$domain_part = implode('.',$domain_part);
if(isset($domains[$domain_part]))
{
$default_domain = $domain_part;
}
else
{
reset($domains);
list($default_domain) = each($domains);
}
unset($domain_part);
}
}
if (isset($login)) // on login
{
if (strpos($login,'@') === false || count($domains) == 1)
{
$login .= '@' . (isset($_POST['logindomain']) ? $_POST['logindomain'] : $default_domain);
}
$parts = explode('@',$login);
$domain = array_pop($parts);
$GLOBALS['login'] = $login;
}
else // on "normal" pageview
{
$domain = $domain_requested;
}
if (!isset($domains[$domain]))
{
$domain = $default_domain;
}
return $domain;
}
/**
* Update session_action and session_dla (session last used time),
*/
private function update_dla()
{
if (isset($_GET['menuaction']))
{
$action = $_GET['menuaction'];
}
else
{
$action = $_SERVER['PHP_SELF'];
}
// This way XML-RPC users aren't always listed as
// xmlrpc.php
if ($this->xmlrpc_method_called)
{
$action = $this->xmlrpc_method_called;
}
$_SESSION[self::EGW_SESSION_VAR]['session_dla'] = time();
$_SESSION[self::EGW_SESSION_VAR]['session_action'] = $action;
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__.'() _SESSION['.self::EGW_SESSION_VAR.']='.array2string($_SESSION[self::EGW_SESSION_VAR]));
}
/**
* Read the diverse repositories / init classes with data from the just loged in user
*
*/
public function read_repositories()
{
$GLOBALS['egw']->acl->acl($this->account_id);
accounts::getInstance()->setAccountId($this->account_id);
$GLOBALS['egw']->preferences->preferences($this->account_id);
$GLOBALS['egw']->applications->applications($this->account_id);
$this->user = $GLOBALS['egw']->accounts->read_repository();
$this->user['acl'] = $GLOBALS['egw']->acl->read_repository();
$this->user['preferences'] = $GLOBALS['egw']->preferences->read_repository();
if (is_object($GLOBALS['egw']->datetime))
{
$GLOBALS['egw']->datetime->datetime(); // to set tz_offset from the now read prefs
}
$this->user['apps'] = $GLOBALS['egw']->applications->read_repository();
$this->user['domain'] = $this->account_domain;
$this->user['sessionid'] = $this->sessionid;
$this->user['kp3'] = $this->kp3;
$this->user['session_ip'] = $this->getuser_ip();
$this->user['session_lid'] = $this->account_lid.'@'.$this->account_domain;
$this->user['account_id'] = $this->account_id;
$this->user['account_lid'] = $this->account_lid;
$this->user['userid'] = $this->account_lid;
$this->user['passwd'] = @$this->passwd;
}
/**
* Splits a login-name into account_lid and eGW-domain/-instance
*
* @param string $login login-name (ie. user@default)
* @param string &$account_lid returned account_lid (ie. user)
* @param string &$domain returned domain (ie. domain)
*/
private function split_login_domain($login,&$account_lid,&$domain)
{
$parts = explode('@',$login);
//conference - for strings like vinicius@thyamad.com@default ,
//allows that user have a login that is his e-mail. (viniciuscb)
if (count($parts) > 1)
{
$probable_domain = array_pop($parts);
//Last part of login string, when separated by @, is a domain name
if (in_array($probable_domain,$this->egw_domains))
{
$got_login = true;
$domain = $probable_domain;
$account_lid = implode('@',$parts);
}
}
if (!$got_login)
{
$domain = $GLOBALS['egw_info']['server']['default_domain'];
$account_lid = $login;
}
}
/**
* Create a hash from user and pw
*
* Can be used to check setup config user/password inside egroupware:
*
* if (egw_session::user_pw_hash($user,$pw) === $GLOBALS['egw_info']['server']['config_hash'])
*
* @param string $user username
* @param string $password password or md5 hash of password if $allow_password_md5
* @param boolean $allow_password_md5=false can password alread be an md5 hash
* @return string
*/
static function user_pw_hash($user,$password,$allow_password_md5=false)
{
$password_md5 = $allow_password_md5 && preg_match('/^[a-f0-9]{32}$/',$password) ? $password : md5($password);
$hash = sha1(strtolower($user).$password_md5);
//echo "<p>".__METHOD__."('$user','$password',$allow_password_md5) sha1('".strtolower($user)."$password_md5')='$hash'</p>\n";
return $hash;
}
/*
* Funtions to access the used session-handler, specified in header.inc.php: $GLOBALS['egw_info']['server']['session_handler']
*/
/**
* Name of session-handler-class
*
* @var string
*/
private static $session_handler = 'egw_session_files';
/**
* Initialise the used session handler
*/
public static function init_handler()
{
if (isset($GLOBALS['egw_info']['server']['session_handler']) && class_exists($GLOBALS['egw_info']['server']['session_handler']))
{
self::$session_handler = $GLOBALS['egw_info']['server']['session_handler'];
}
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__.'() session_handler='.self::$session_handler.', egw_info[server][session_handler]='.$GLOBALS['egw_info']['server']['session_handler']);
if (method_exists(self::$session_handler,'init_session_handler'))
{
call_user_func(array(self::$session_handler,'init_session_handler'));
}
ini_set('session.use_cookies',0); // disable the automatic use of cookies, as it uses the path / by default
session_name(self::EGW_SESSION_NAME);
if (($sessionid = self::get_sessionid()))
{
session_id($sessionid);
session_start();
self::decrypt();
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__."() sessionid=$sessionid, _SESSION[".self::EGW_SESSION_VAR.']='.array2string($_SESSION[self::EGW_SESSION_VAR]));
}
else
{
if (self::ERROR_LOG_DEBUG) error_log(__METHOD__."() no active session!");
}
}
/**
* Get a session list (of the current instance)
*
* @param int $start
* @param string $sort='session_dla' session_lid, session_id, session_started, session_logintime, session_action, or (default) session_dla
* @param string $order='DESC' ASC or DESC
* @return array with sessions (values for keys as in $sort) or array() if not supported by session-handler
*/
public static function session_list($start,$sort='DESC',$order='session_dla')
{
if (method_exists(self::$session_handler,'session_list'))
{
return call_user_func(array(self::$session_handler,'session_list'),$start,$sort,$order);
}
return array();
}
/**
* Query number of sessions (not more then once every N secs)
*
* @return int|boolean integer number of sessions or false if not supported by session-handler
*/
public static function session_count()
{
if (method_exists(self::$session_handler,'session_count'))
{
return call_user_func(array(self::$session_handler,'session_count'));
}
return false;
}
/*
* depricated functions, to be removed after 1.6
*/
/**
* Delete all data from the session cache for a user
*
* @param int $accountid user account id, defaults to current user (optional)
* @deprecated not longer used / necessary
*/
function delete_cache($accountid='')
{
}
}
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